患儿男,2岁。不慎溺水,救起后现场口对口人工呼吸,此时吸入的氧浓度为A、20%~40%B、

作者: rantiku 人气: - 评论: 0
问题 患儿男,2岁。不慎溺水,救起后现场口对口人工呼吸,此时吸入的氧浓度为
选项 A、20%~40% B、<18% C、60%~80% D、40%~60% E、80%
答案 B
解析

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